Any suggestions?

Question about the task

Do we have a pair?

Java Syntax, Level 4, Lesson 4

Under discussion

I really can't figure out why the requirements are not met

Use the keyboard to enter three integers. Determine whether there is at least one pair of equal numbers among them.
If such a pair exists, display the numbers separated by a space.
If all three numbers are equal, then display all three.

Here are some examples:
a) if you enter the numbers
1
2
2
then we display
2 2

b) if you enter the numbers
2
2
2
then we display
2 2 2

Requirements:

The program should read the numbers from the keyboard.
The program should contain System.out.println() or System.out.print().
If two numbers are equal to each other, you must display them on the screen.
If all three numbers are equal, then display all three.
If there are no equal numbers, don't display anything.

package com.codegym.task.task04.task0417; /* Do we have a pair? */ import java.io.*; public class Solution { public static void main(String[] args) throws Exception { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String a = br.readLine(); int num = Integer.parseInt(a); String b = br.readLine(); int num1 = Integer.parseInt(b); String c = br.readLine(); int num2 = Integer.parseInt(c); if((a == b) && (b == c)){ System.out.println(a + " " + b + " " + c); } if(a == b){ System.out.println(a + " " + b); } if(a == c){ System.out.println(a + " " + c); } if(b == c){ System.out.println(b + " " + c); } if(b == a){ System.out.println(b + " " + a); } if(c == a){ System.out.println(c + " " + a); } if(c == b){ System.out.println(c + " " + b); } } }

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Vidya Pb

Level 5 , Ernakulam, India

1 November 2019, 08:19

After converting the Strings a,b,c into integers num, num1, num2., you haven't used them in the if conditions. Instead you used the strings a,b,c which is the reason for your errors.

Guadalupe Gagnon

Level 37 , Tampa, United States

1 November 2019, 03:53

#1 you are comparing strings and not numbers. Check your code:

String a = br.readLine();
int num = Integer.parseInt(a); // num is never used
if((a == b) && (b == c)){

#2 use if-else if statements.This program will print too many numbers to the screen because every if statement that is true will print something. With an if-else if block, only the first if that returns true will print and the rest will be ignored. #3 you have duplicate checks: line 25 if(a == b) is the same exact as line 34 if(b == a). Reversing the variables when checking for equality will not produce different results. Remove all the duplicates When you fix these 2 problems your task should pass